In the upcoming special â€œBig Time Christmas,â€ the guys are excited to head back to Minnesota for the holidays, but hours before their flight, Griffin tells them they have to stay in Los Angeles to record a three-song holiday EP â€” and two of the songs have to be with celebrities. Racing against time, they help Gustavo (Stephen Kramer Glickman) write the first song, â€œBeautiful Christmas.â€